It's not Trainor's first taste of chart supremacy in Australia. Her breakthrough single "All About That Bass" topped the ARIA Singles Chart last August. "Bass," which appears on Title, held the top slot for four weeks and is now certified five-times platinum (350,000). Follow-up single "Lips Are Movin" peaked at No. 3 last November, while "Dear Future Husband" arrives this week at No. 27.

The American singer-songwriter will look to capitalize on her early success Down Under when she plays her first shows here this April. The Grammy-nominated pop star's That Bass Tour of Australia will visit Sydney's Luna Park (April 27) and Melbourne's The Forum (April 30).

In other chart news, Sia's captivating -- and controversial -- promo for "Elastic Heart" (Inertia) has helped catapult the single into the top 10 and pump-up the album from which it was lifted. "Elastic Heart" bows at No. 8, and follows the No. 2 peak for "Chandelier" (released April 2014). Another version of "Elastic Heart", featuring The Weeknd and Diplo, topped out at No. 67 back in 2013. Sia's latest LP 1000 Forms Of Fear, a chart-topper on its release last July, returns to No. 11 on the ARIA Albums Chart this week, published Sunday (Jan. 18).